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Finding the Fourth Proportional to 61,810.75, 93,179.40 and 57,691.11

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Solution

The fourth proportional to 61,810.75, 93,179.40 and 57,691.11 is: 86,969.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,810.75 : 93,179.40 = 57,691.11 : x
  2. Step 2: Convert to fraction form
    61,810.75/93,179.40 = 57,691.11/x
  3. Step 3: Cross multiply
    61,810.75x = 93,179.40 × 57,691.11
  4. Step 4: Simplify right side
    61,810.75x = 5,375,623,148.22
  5. Step 5: Solve for x
    x = 5,375,623,148.22/61,810.75
  6. Step 6: Final answer
    x = 86,969.07

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.